gr_sprite.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef M4_GRAPHICS_GR_SPRITE_H
#define M4_GRAPHICS_GR_SPRITE_H

#include "m4/m4_types.h"

namespace M4 {

enum {
    NO_COMPRESS     = 0x00,
    RLE8            = 0x01,
    SHADOW          = 0x80
};

struct DrawRequest {
    Buffer *Src = nullptr;      // sprite source buffer
    Buffer *Dest = nullptr;     // destination buffer
    int32 x = 0;            // x position relative  to Destination(0, 0)
    int32 y = 0;            // y position relative  to Destination(0, 0)
    int32 scaleX = 0;       // x scale factor (can be negative for reverse draw)
    int32 scaleY = 0;       // y scale factor (can't be negative)
    uint8 *depthCode = nullptr; // depth code array for destination (doesn't care if srcDepth is 0)
    uint8 *Pal = nullptr;           // palette for shadow draw (doesn't care if SHADOW bit is not set in Src.encoding)
    uint8 *ICT = nullptr;       // Inverse Color Table (doesn't care if SHADOW bit is not set in Src.encoding)
    uint8 srcDepth = 0;     // depth code for source (0 if no depth processing)
};


uint32 gr_sprite_RLE8_encode(Buffer *Source, Buffer *Dest);
uint8 gr_sprite_draw(DrawRequest *DrawReq);

} // namespace M4

#endif